Mainly because I've trained with stick & dagger and have never trained with machete & dagger. Also I like the variety that having an impact weapon in one hand and a cutting weapon in the other hand gives. Bear in mind that I'm just talking about my favorite weapon set to train with. If we're talking post-apocalyptic wasteland scenario, then it would probably be something more like kris & handgun. Also, while I really don't spend a lot of time worrying about self-defense scenarios (not saying no time, just not a lot) I could apply some stick & dagger stuff with, for example, umbrella and folding knife. I can't go carrying a machete around, at least not in Chicago .